The Metropolitan Police were called with reports of an altercation inside a shop in Wandsworth Road at 2.22am yesterday (April 9)
Officers and London Ambulance Service attended and found a man who had been stabbed.
He was treated at the scene before being taken to hospital.
His condition has now been confirmed as non-life threatening or life changing.
There have been no arrests at this stage and enquiries are underway.
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A Met spokesperson said: “Police were called at 2.22am on Wednesday, April 9, to reports of an altercation inside a store in Wandsworth Road, Stockwell.
“Officers alongside the London Ambulance Service attended, and a man in 20s was treated for stab injuries. He was taken to hospital, where his injuries were assessed as non-life-changing and non-life-threatening.
“No arrests have been made at this time. Anyone with information is asked to contact police on X @MetCC or call 101 quoting the reference number 7825/09APR25.”